Shear press



4 Sheets-Sheet 1 W. G. WEHR Jan. 30, 1951 SHEAR PRESS y R M w E w W m WU m M T 1 G 4 r |l l M pm w l W 1 v I. i: J W K I H HH I H H HWWH IWMWHMWH WWM n n H I MM I HW IWH I I H H I I I H WI I I H M w Jill! m r Ill!n H I H F H W l l m l fl n l WH H H HH H HM l l n fl l WH U n H... N w

W. G. WEHR Jan. 30, 1951 SHEAR PRESS Original Filed April 21, 1944 4Sheets-Sheet 2 /III Ill/ W Wmu INVENTOR. MAL/A'M G. l VEHE ATTORNEY? W.G. WEHR SHEAR PRESS Jan. 30, 1951 4 Sheets-Sheet 3 Original Filed April21, 1944 INVENTOR. MAL/AM G. We? BY A T TOR'A/EVS W. G. WEHR SHEAR PRESSJan. 30, 1951 4 Sheets-Sheet 4 Original Filed April 21, 1944 INVENTOR.lV/LL/flM 6'. VVEHE BY 97 HTTQENE Y5 Patented Jan. 30, 1951 UNITEDSTATES PATENT OFFICE SHEAR PRESS William G. Wehr, North Madison, Ohio,assignor to The Cleveland Crane & Engineering Company, Wicklifie, Ohio,a corporation of Ohio 3 Claims.

The present invention relates to power-operated, heavy duty shears and,more particularly, to a novel and improved method of supporting thelower stationary shearing knives thereof.

When heavy duty shears of the general type employed. in shops engaged infabricating metal plates and the like are initially set up and aftereach grinding of the lower shearing knife, the knife is adjusted levelor substantially level with the top of the bed or work table. Meansheretofore employed for accomplishing the aforesaid adjustment have beenunsatisfactory for one reason or tnother. With the foregoing in mind,the principal object of the present invention is the provision of anovel and improved, poweroperated, heavy duty shears of the characterreferred to having improved means for conveniently adjusting the heightof the lower shearing knife, which means is simple in construction,reliable in operation, and supports the knife throughout its entirelength in such a manner that it will not flex under the heavy loads towhich it is subject in operation.

The invention resides in certain constructions and combinations andarrangements of parts, and further objects and advantages will beapparent to those skilled in the art to which it relates from thefollowing description of the preferred. embodiment described withreference to the accompanying drawings forming a part of thisspecification in which similar reference characters designatecorresponding parts throughout the several views, and in which l is afront elevational view of a poweroperated, heavy duty shears embodyingthe present invention;

Fig. 2 is a rear view of the shears shown in Fig. 1;

Fig. 3 is a sectional view approximately on the line 3-3 of Fig. 1;

Fig. 4 is an enlarged view of a portion of Fig. 3;

Fig. 5 is a fragmentary view of Fig. 4, looking from the right; and

Figs. 6 and '7 are views similar to Figs. 4 and 5 but showing a modifiedconstruction.

This application is a division of my copending application Serial No.532,078, now Patent No. 2,397,896, issued. April 2, 1946, and only thoseparts of the shears shown and described in said application which arenecessary to a complete understanding of the present invention areherein shown and described in detail. Reference to the aforesaidapplication is made for a complete showing and description of thoseparts of the shears not fully shown and described herein.

Referring to the drawings, the reference character A designates a framecomprising stressresisting, plate-like end members or side housings it,it having aligned openings l2, l3, respectively, in their front edges;acrown l4; and a bed comprising plate-like members [5, l6 and I l, thelatter of which forms a scrap chute. The vertical plate-like member I5is located immediately to the rear of and welded to the horizontalplate-like member l6, which member in addition to reinforcing the upperedge of the member l5, forms a support or work table for the Work. Theupper member or crown H is generally box-shaped in cross-section and hasits opposite ends welded to the side housings III, E: adjacent to theirfront upper edges. Web members 2%, '2! and 22 welded to the interior ofthe member l4 reinforce the same and the lower ends of the members 26,2| which extend below the rear side of the member I4 form supports forsuitab e bearings within which a crankshaft 23 is rotatably supported.

The shearing operation is performed by a movable shearing knife 24connected to the lower front edge of an inclined plate 25 forming a partof a movable ram or blade,-designated generally by the referencecharacter B and a lower stationary shearing knife 26 located adjacent tothe upper rear corner of the bed. The movable ram or upper blade B is ofbuilt-up construction and comprises end members 21, 28 welded to theends of the plate 25 and extending toward the rear where they arerotatably connected to short shaft-like members 38, 3| rotatablysupported in suitable apertures in the side housings H], II,respectively, for rotation about axes eccentric to the axes about whichthe end members 21, 2B are connected thereto. The front plate 25 of theblade B is inclined at a slight angle to the Vertical, as clearly shownin Fig. 3, to provide clearance between the ram or movable blade B andthe stationary shearing knife '24 when the blade is moved in a downwarddirection.

The front end of the ram or movable blade B is supported and the entireblade assembly is adapted to be oscillated about the shafts 30, 3! bypitmans 33, the upper ends of which are operatively connected toeccentrics 34 on the crankshaft 23 and the lower ends to short shafts35, 3 5 fixed in opposite ends of the blade B. The crankshaft 23 isrotated to reciprocate the movable rarn or blade B by an electric motor37 adjustably secured to the back of the crown IQ and operativelyconnected to the crankshaft by means including a friction clutch andbrake operated in such a manner that when the foot treadle 38 isdepressed and immediately released, the crankshaft makes one completerevolution but will continue to rotate as long as the foot pedal isdepressed. As shown, the weight of the movable blade B iscounterbalanced by adjustable compression springs 40, one at either endof the ram, located within tubular housings I, 42 fixed to the crownmember 14.

The shears shown also includes a plurality of spring-loaded, hold-downdevices 45 detachably bolted to the lower edge of a hold-down plate -55suspended from the forward arms of bell crank levers 41, 48 pivotallyconnected to the plates 20, 2|, the rear arms of which levers areprovided with rollers adapted to engage earns 50 on the crankshaft 23.The levers 4?, 48 are continuously urged in a clockwise direction, asviewed in Fig. 3, to engage the rollers thereon with the cams 50 bysuitable compression springs 5! interposed therebetween and the top ofthe crown member Id. The lower part of the hold-down plate 48 isconnected to the side housings it, H by links 52, one at either side ofthe hold-down plate, which links are pivotally connected to thehold-down plate and to the side housings I9, I I.

The lower front edge of the plate 25 is out out so as to receive theupper shearing knife 24, which knife is'held in position therein by aplurality of screws 53 projecting therethrough and threaded intosuitably tapped apertures adjacent to the lower edge of the plate 25.The heads of the screws 53 are located in a groove in the front face ofthe shearing knife and are countersunk so as not to interfere with theoscillation of the movable blade B.

The lower shearing knife 25 is adjustably secured in a cut-out portion'55 extending along the upper rear edge of the bed member 15 by aplurality of headed screws 55 projecting through vertically elongatedholes 51 therein and threaded into suitably tapped apertures 58 in themember I5. "The heads of the screws 55 are countersunk in the rear sideof the shearing knife 25 so as not to interfere with the movement of theupper shearing knife 2 or material sheared thereby. Alternatively, theblade 26 may be secured to the bed by bolts 6%, see Figs. 6 and 7,projecting through *round'holes 6 l in the blade and verticallyelongated holes 62 in the member if: or by some suitable equivalentarrangement.

The bottom of the shearing knife 26 is supported and the knife isadapted to be adjusted vertically so as to align the top thereof withthe top of the member it which forms the work table by an elongated gibbar 65 extending the entire length of the shearing knife and interposedbetween the bottom thereof and a rearwardly inclined surface "66 at thebottom of the cut-out portion 55 of the bed member I5. The lower surface6 of the gib '65 is inclined in a manner to cooperate with the inclinedsurface 65 of the bed member. The gib is held in position and adapted tobe adjusted toward and from the bed member (5 to raise or lower theknife 26 by a plurality of screws 68 projecting through verticallyelongated slots 10 therein and threaded into suitably tapped roles H inthe bed member 15. Alternatively the gib bar 55 may be secured by bolts12, see Figs. 6 and '7, projecting through round holes 13 in the gib barand vertically elongated holes 14 in the member 15 or by some suitableequivalent arrangement. The bolts til, '12 are provided with washers 15,16, respectively, and nuts I 1, 18, respectively located at the frontface of the member l5. With the construction shown in Figs. 6 and 7,slots are cut in the member [6 to accommodate the washers 15 and thenuts 11.

The shearing knife .26 may be adjusted horizontally with respect to themember Hi, if desired, by shims or the like interposed behind the knife.The fact that the gib 65 is relatively long and flexible enables variousparts of it to be drawn into the aperture 55 different amounts, thusobtaining any desired vertical adjustment of the shearing knife 26 whileproviding a continuous support for the knife throughout its length. Withthis construction, the shearing knife is rigidly supported at all times.With the particular form of shears shown, the fact that the gib bar 65projects slightly to the rear of the cutting edge of the lower shearingknife 26 is immaterial because the upper shearing knife 24 moves alongan arc and will clear the gib even though the movement of the movableblade B is sumcient to carry the upper knife 24 to a position below thelower knife 26. I desired, the gib 65 can be so constructed that it willfit wholly within the cut-out portion 55.

From the foregoing it will be apparent that the objects of the inventionheretofore enumerated and others have been accomplished and that therehas been provided a novel and improved shears of the character referredto comprising means for adjusting the lower knife vertically, whichmeans supports the knife throughout its length. While the preferredembodiment of the invention 'has been described in considerable detail,-I do not wish to be limited to the particular construction shown whichmay be varied within the scope of this invention and it is my intentionto hereby cover all adaptations, modifications and uses thereof whichcome within the practice of those skilled in the art to which theinvention relates and within the scope of the appended claims.

Having thus described my invention, what I claim is:

1. In a power-operated shears, the combination of a :bed adapted to havean elongated shearing knife connected thereto with its upper edgesubstantially aligned with the upper surface of said bed, an elongatedflexible gib extending longitudinally of and underneath said knife andadapted to support the latter throughout its length and upon movementthereof in a direction transverse to the length of said knife to adjustsaid knife vertically relative to said bed, said bed and said gib havingengaging surfaces inclined transversely of the length of said knife, aplurality of means spaced along said gib for adjusting intermediateportions of said gib relative to said bed in a direction transversely ofthe length of said knife, and means adapted to permit vertical movementof said knife upon adjusting movement of said gib and to clamp saidknife to said bed after completion of an adjustment of said gib.

2. 'In a power operated shear, a bed, an elongated shearing knife havingone side in frictional engagement with a surface of said bed, a

plurality of clamping means disposed along said knife and adapted toclamp said knife to said surface, an elongated flexible gib disposedbeneath and substantially coextensive with said :nife, said bed having asurface on which said gib rests, cam means formed along one edge of saidgib and operative when said gib is moved laterally with respect to saidknife for effecting vertical movement of said knife, and a plurality i 5of means along said gib for adjusting intermediate portions of said giblaterally relative to said knife.

3. In a power operated shear, a bed, an elongated shearing knife havingone side in frictional engagement with a surface of said bed, aplurality of clamping means disposed along said knife and adapted toclamp said knife to said surface, an elongated flexible gib disposedbeneath and substantially coextensive with said knife, said knife andgib having substantially horizontal abutting surfaces, said bed having asurface on which said gib rests, the engaging surfaces of said gib andbed being inclined laterally with respect to said knife whereby lateralmovement of said gib relative to said knife moves said gib vertically,and a plurality of means along said gib for adjusting intermediateportions of said gib laterally relative to said knife.

WILLIAM G. WEHR.

weeds 6 REFERENCES CITED The following references are of record in thefile of this patent:

UNITED STATES PATENTS Number Name Date Re. 20,154 Baker Nov. 3, 1936490,777 Trethewey Jan. 31, 1893 565,186 Taylor Aug. 4, 1896 691,234Bowen Jan. 14, 1902 1,859,336 Mac Chesney et a1. May 24, 1932 1,955,671Coyle Apr. 17, 1934 FOREIGN PATENTS Number Country Date 465,011 GermanySept. 10, 1928 699,145 France Dec. 8, 1930

